Features 1、Melting Kit: The 6 piece melting metal crucible set includes a soldering board, melting tongs, crucible tongs, and 3 quartz crucibles in 100g, 250g, and 500g sizes, meeting all your melting needs in one set. 2、Premium Materials: Made of fused quartz, combined with advanced ceramic processing technology, ensuring the crucible has excellent heat resistance (up to 3272℉ / 1800℃) and reliable performance. The stainless steel crucible tongs provide a comfortable grip for easier using. 3、Multiple Size Options: The quartz crucibles in the set come in three different sizes, with diameters of 5.6cm (100g), 7.4cm (250g), and 9.3cm (500g), with excellent thermal conductivity. This ceramic crucible set can withstand temperatures up to 3272℉ / 1800℃. 4、Wide Application: This ceramic quartz crucible torch cup set is suitable for a variety of precise casting processes, including melting high temperature metals such as gold, silver, copper, brass, and bronze. Whether you are a jeweler, metalworker, blacksmith, or chemical refining merchant, it is an indispensable tool for you. 5、Usage Tips: To enhance the performance of the quartz ceramic crucible, we recommend slowly heating it and applying borax glaze (not included) before use. Following these steps will not only optimize your workflow but also effectively extend the crucible's use life. Specification Item Type: Crucible Metal Melting Kit Set includes: Soldering Board x 1; Melting Tongs x 1; Crucible Tongs x 1; Quartz Crucibles x 3, 100g, 250g, 500g. Material: Stainless Steel, Quartz, Ceramic Package List 1 x Soldering Plate 1 x Crucible Tong 1 x Crucible Clamp 3 x Quartz Crucible